I bought a monster cable from guitar center for my keyboard, "studiolink" that has 2 1/4" going into one 1/4" instead of using 2 instrument cables for stereo sound, according to the guy who sold me it...usually when I plug two cables from one keyboard into my mixer i get alot more volume then just one.

i plugged the end with 2 jacks into the back of my keyboard and the one jack into my mixer, and it sounded like just one cable...im really dissapointed as the cable was $45 and i threw away the original packaging...why arent I getting the volume of 2 cables with this?